Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48aa63636b0e38c…

MALICIOUS

PDF

74.5 KB Created: 2020-09-16 12:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00fb57e2f2fff9c293484093f62eaab8 SHA-1: 57c3c7cf3992162401244a213fc51ca524994886 SHA-256: b48aa63636b0e38ce957948286750f783cae9d5420ccb07f60b42884f3adbf5b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external PDF links, suggesting a link farm. The document body and heuristics also indicate it's a lure for an advance-fee scam or fake invoice. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=blank+stock+typically+includes+preference+for+receiving+dividends In PDF document text
    • http://pepusa.improvementscientist.com/uploads/1/3/1/3/131383914/e79425d31210d.pdfIn PDF document text
    • http://files.beithashaar.com/uploads/1/3/2/7/132741023/7192478.pdfIn PDF document text
    • http://files.rockrivertownship.org/uploads/1/3/0/8/130874474/zutidizurarugofifalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/30ea26_e8ac29012d814c58a3b88a8e239ed152.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f8cea_281fb951c4e0452aa3e9b8457625b1f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ade13_8ab9f8a85a4c49b78d1175922da9df73.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b5dd9_f8df9b9787ef4ffcb6ad546fc90698aa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf5aa9_19f4021afc094a70a91b78ac43cdba61.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/venenatis_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/94360929289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/86166188367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/kifex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7039/8368/files/84814767825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6757/8270/files/the_bachelor_season_17_episode_11_watch_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/biology_mcq_questions_for_class_10_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3167/0179/files/geometry_dash_world_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5460/files/just_one_day_book.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 5600 bytes
SHA-256: 3b905c3387b99c4ddf801e39204b1e2667a70b8ae43d50ce3fdb50e27110fc16
font_01_sfnt_off0000f736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 10852 bytes
SHA-256: 11c1ba9abb374334b04f3fa73f60999b5ee31888562f1d5d0c0aa7bb045822f7

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